llvm-nm

[ElvishJerricco]

GHC uses nm to find the sizes of some things when building, but llvm-nm doesn't quite work for WebAssembly (or -flto for that matter). They tried fixing it once, but llvm-nm now shows the offset information, not the size information as expected.

We currently have a hacky fix that uses -flto to trick GHC into producing LLVM bitcode, which we then llvm-dis to get the necessary information out of. I find it rather amusing that this works, but it's obviously a terrible solution.

We have a ticket in with LLVM:
https://bugs.llvm.org/show_bug.cgi?id=34392

[dfordivam]

This has been fixed in LLVM (see https://reviews.llvm.org/rL312294). So the hack should be removed.